In such type of questions, clues are given regarding comparisons among a set of persons or things with respect to one or more qualities. The candidate is required to analyse the whole information, form a proper ascending / descending sequence and then answer the given questions accordingly.
Ashish is heavier than Govind. Mohit is lighter than Jack. Pawan is heavier than Jack but lighter than Govind.
Who among them is the heaviest ?
In terms of weight, we have :
Govind < Ashish, Mohit < Jack, Jack < Pawan, Pawan < Govind.
So, the sequence becomes :
Mohit < Jack < Pawan < Govind < Ashish.
Clearly, Ashish is the heaviest.